Abstract
This paper presents a novel radial network for feeding concentric ring antenna arrays. The proposed feeding network consists of a radial network of 1 input to 20 outputs. Two stages are required for this planar radial network: a radial power divider of 1 to 5 and a cascade Wilkinson power divider of 1 to 4 to generate 20 outputs that feed to a concentric rings antenna array. The proposed radial network provides a feeding network having balance in magnitude and phase to be applied in antenna systems based on a concentric rings array geometry. The paper provides as an interesting contribution the full antenna system considering the proposed radial feeding network (1 to 20) and the concentric rings antenna array. Full wave electromagnetic simulations and experimental measurements are implemented to verify the performance of matching, bandwidth and radiation pattern of the full system taking the mutual coupling into account.
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